Modular platform system

ABSTRACT

A platform module suspendable from a structure for supporting a dynamic load with respect to a support surface of the structure including a first framing member suspended with respect to the structure. A second framing member is suspended with respect to the structure and mounted with respect to the first framing member. A deck panel is positioned between the first framing member and the second framing member and suspended with respect to the structure. At least one adjustable suspension member is attached to each of the first framing member and the second framing member, and removably mounted with respect to the structure. Also disclosed is a modular platform system including a plurality of platform modules and a method for suspending a modular platform system with respect to the structure.

CROSS REFERENCE TO RELATED APPLICATION

[0001] This application claims the benefit of U.S. ProvisionalApplication No. 60/400,827, filed 02 Aug. 2002.

BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] This invention relates to a modular platform system and a methodof installing the modular platform system, wherein a plurality ofoperatively connected platform modules can be quickly and efficientlysuspended with respect to a working location. More specifically, thisinvention relates to a modular platform system and method of installingthe system wherein a plurality of platform modules can be installed andsuspended with respect to a bottom or underside support surface of abridge structure or other structure, for example.

[0004] 2. Description of Prior Art

[0005] Many deck structures are supported by an angle bracket having oneleg structurally welded to an edge portion or an underside of ahorizontal flange of a steel stringer, a steel plate, a girder, oranother suitable steel primary structural member. Deck pans or othersuitable deck panels of these deck structures are individuallypositioned between opposing angle brackets which are welded into placein the field. Each deck pan is positioned upon horizontal flanges ofsuch field-installed opposing angle brackets. The deck pan is thensecured with a sheet metal screw or a weld, also at the job site.

[0006] With these deck framing systems, each vertical height adjustmentto vary the elevation of the top of the deck pan requireslabor-intensive field adjustments, of ten accomplished with weldedconnections. Further, many of these deck framing systems have weldedconnections or metal fasteners exposed beneath the deck structure.

[0007] Thus, a problem associated with deck framing systems and methodstherefor that precede the present invention is that they do notfacilitate quick installation of the deck panels by permittingpre-placement of the securement means prior to installation of the deckpanels, and movement of the securement means as the deck panels areinstalled.

[0008] Still a further problem associated with deck framing systems andmethods therefor that precede the present invention is that they do notfacilitate efficient transportation to a job site in a manner that savesshipping space and thereby saves time, energy and money.

[0009] Yet an additional problem associated with deck framing systemsand methods therefor that precede the present invention is that they donot enable efficient assembly and erection of the deck framing system.

[0010] Still a further problem associated with deck framing systems andmethods therefor that precede the present invention is that the verticalheight of each deck panel structure cannot be quickly adjusted usingsimple mechanical elements to accommodate the varying dimensionalcharacteristics of the prefabricated deck panel structures.

[0011] For the foregoing reasons, there has been defined a long felt andunsolved need for a modular platform system and method that can bequickly and easily suspended and removed from a structure in order tomaintain and/or repair the structure, inexpensive to manufacture andadjustable to accommodate a variety of prefabricated parts of differingsizes and dimensions.

SUMMARY OF THE INVENTION

[0012] It is one object of this invention to provide a platform modulefor use in a modular platform system that can be suspended with respectto a structure, for example an underside support surface of a bridgeconstruction.

[0013] It is another object of this invention to provide a modularplatform system that is easily suspended from a structure in order toaccess areas of the structure for maintenance and/or repair.

[0014] It is another object of this invention to provide a modularplatform system that can be easily removed from the structure afterscheduled maintenance and/or repair.

[0015] It is another object of this invention to provide a modularplatform system having containment means for containing debris,including hazardous materials, such as lead paint, removed from astructure during maintenance and/or repair procedures.

[0016] The above and other objects of this invention are accomplishedwith a platform module suspendable from a structure. The platform moduleincludes a first framing member suspended with respect to the structureand a second framing member suspended with respect to the structure andmounted with respect to the first framing member. At least one deckpanel is positioned between the first framing member and the secondframing member and suspended with respect to the structure to provide aworking surface for the contractors working on the structure. Theplatform modules are removably mounted or suspended with respect to thestructure using adjustable suspension members connected or attached tothe first framing member and the second framing member.

[0017] The modular platform system includes a second platform modulethat is movably connected to the first platform module so that it ismovable between a first position operatively connected to the firstplatform module and a second or extended position wherein the secondplatform module is linearly aligned with the first platform module andsuspended with respect to the structure. For example, at least one andpreferably a plurality of channel trolleys are mounted to each framingmember of the first platform module. The channel trolleys includerotatable wheels that can be positioned within a channel formed by thecorresponding framing member of the second platform module to allow thesecond platform module to move with respect to the first platform modulesuspended from the structure.

[0018] The second platform module can be the same or similar to thefirst platform module, or different. Preferably, the second platformmodule includes a first framing member operatively connected to thefirst platform module first framing member and a second framing memberoperatively connected to the first platform module second framingmember. A deck panel is positioned between the first framing member andthe second framing member. The second platform module can be removablymounted or suspended with respect to the structure using adjustablesuspension members attached to each framing member, in the secondposition. In the second position, the first platform module and thesecond platform module can be connected or secured in linear alignmentusing any suitable mechanical connection known to those having ordinaryskill in the art. The term “linear alignment” as used throughout thisspecification refers to alignment of abutting framing members generallyparallel in a direction along a width of the structure so that the uppersurfaces of adjacent platform modules are flush.

[0019] The deck panel may be any suitable material depending upon theintended use for the platform module. For example, the deck panel may bemade of wood panels or wood composite materials, concrete, metal,fiberglass or other suitable insulating materials, composites andcombinations thereof. Further, the deck panel may provide a barrier tovapor, heat, and/or solvents, for example. The deck panel may have anysuitable size to span between the first framing member and the secondframing member along a length of the framing members.

[0020] The modular platform system can be easily installed to suspendfrom a structure, such as a support structure of a bridge construction.The suspended modular platform system of the present inventionpreferably comprises a plurality of operatively connected platformmodules stacked or otherwise configured in a compact or efficientmanner. Alternatively, independent platform modules may be connectedtogether to form the suspended modular platform system. The platformmodules can be raised from a ground surface or can be lowered from asurface of the bridge structure to position the suspended modularplatform system with respect to the underside support surface of thebridge construction.

[0021] The modular platform system can be hoisted using a crane or othersuitable machinery and suspended over an edge portion of the bridge. Themodular platform system is positioned with respect to the undersidesupport surface of the bridge structure and the first platform module issecured in position with respect to the support surface using at leastone support member.

[0022] In one preferred embodiment of this invention, the first andsecond framing members are suspended from the support surface of thestructure. The framing members can be securely connected to thestringers of the bridge using suitable beam clamps, for example, and runor extend perpendicular to the stringers, i.e. towards the centerline ofthe bridge. A preferred beam clamp is available from Multuloc Corp.located in Park Ridge, Ill., U.S.A. under the trade name Tuloc beamclamp. Preferably, the second framing members are suspended from thesupport surface and run or extend parallel with the first framingmembers. In certain embodiments of this invention wherein the structureand/or the support surface has a general arcuate or non-linear shape,the first and second framing members may not run or extend in a paralleldirection. Rather, in such an embodiment, the framing members mayconverge or diverge with respect to each other as the framing membersapproach the centerline of the bridge.

[0023] The first platform module is suspended with respect to thestructure. A second platform module is extended from a first positionoperatively connected to the first platform module to a second positionlinearly aligned with the first platform module and suspended withrespect to the structure. The second platform module can be connected tothe first platform module in the second position using any suitablemechanical connection. Each of the platform modules are suspended withrespect to the structure using at least one adjustable suspension memberattached to the first framing member and at least one adjustablesuspension member attached to the second framing member. Preferably,each suspension member is removably mounted with respect to a supportsurface of the structure, such as a support beam or stringer.

[0024] In one preferred embodiment of this invention, a second modularplatform system can be constructed laterally adjacent to the firstmodular platform system and suspended with respect to the structure. Thesecond modular platform system can be connected to the first modularplatform system.

[0025] Additionally, where the structure and/or the support surfaceslopes in a lateral direction generally perpendicular to the centerlineof the bridge, the vertical distance of adjacent panel structures withrespect to the support surface may be adjusted to form a level panelstructure surface. Alternatively, the adjacent panel structures may formsteps or a “stepped” panel structure surface. For example, the framingmembers may be adjustably connected to the support surface usingthreaded rods and/or turn buckles.

[0026] After the repair and/or repainting project is completed, themodular platform system is easily removed from the structure and can bereused. The extended platform modules can be retracted from the secondposition to the first position after the suspension members aredisconnected from the support stringers. The retracted modular platformsystem can then be hoisted up to the upper surface of the structureusing a crane or other suitable machinery and easily loaded onto a truckfor removal from the work location. Any number of modular platformsystems can be used to form a suitable platform, depending upon the sizeof the job.

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above-mentioned and other features and objects of thisinvention will be better understood from the following detaileddescription when taken in view of the drawings wherein:

[0028]FIG. 1A is a side view of a modular platform system comprising aplatform module suspended with respect to a structure, according to onepreferred embodiment of this invention;

[0029]FIG. 1B is a side view of a modular platform system comprising aplatform module suspended with respect to a structure, according to onepreferred embodiment of this invention;

[0030]FIG. 2 is a side view of a platform module removably connectedwith respect to a structure, according to one preferred embodiment ofthis invention;

[0031]FIG. 3A is a side view of a platform module removably connectedwith respect to a structure, according to one preferred embodiment ofthis invention;

[0032]FIG. 3B is a front view of a platform module removably connectedwith respect to a structure, according to one preferred embodiment ofthis invention;

[0033]FIG. 3C is a front view of a platform module removably connectedwith respect to a structure, according to one preferred embodiment ofthis invention;

[0034]FIG. 4 is a perspective view of a channel trolley, according toone preferred embodiment of this invention;

[0035]FIG. 5 is a perspective view of a channel trolley, according toone preferred embodiment of this invention;

[0036]FIG. 6 is a front view of a modular platform system comprising aplurality of operatively connected platform modules, according to onepreferred embodiment of this invention;

[0037]FIG. 7 is a side view of a modular platform system comprising aplurality of operatively connected platform modules in a first positionand a first platform module removably suspended from adjacent stringersof the structure, according to one preferred embodiment of thisinvention;

[0038]FIG. 8 is a side view of a modular platform system comprising aplurality of platform modules each in a second or extended position,according to one preferred embodiment of this invention;

[0039]FIG. 9 is a front view of a platform module connected to adjacentplatform modules and suspended with respect to a structure, according toone preferred embodiment of this invention;

[0040]FIG. 10 is a front view of a platform module connected in astepped fashion to adjacent platform modules and suspended with respectto an angled or sloped bottom support surface of a structure, accordingto one preferred embodiment of this invention;

[0041]FIG. 11 is a perspective view of a platform module, according toone preferred embodiment of this invention;

[0042]FIG. 12 is a perspective view of a platform module, according toone preferred embodiment of this invention;

[0043]FIG. 13 is a perspective view of a modular platform system havinga guard rail system, according to one preferred embodiment of thisinvention;

[0044]FIG. 14 is a front view of a guard rail system post secured withina framing member, according to one preferred embodiment of thisinvention; and

[0045]FIG. 15 is a front view of a modular platform system comprising afirst platform module operatively connected to a second platform module,according to one preferred embodiment of this invention.

DESCRIPTION OF PREFERRED EMBODIMENTS

[0046] The modular platform system 10 of the present invention can besuspended with respect to a structure to support a dynamic and/or staticload with respect to an underside surface of the structure. For example,the structure may comprise a bridge construction having a plurality ofsupport beams or stringers extending along a length of the bridge toform support surfaces. In order to repair and/or paint the bridge,particularly an underside or bottom support surface of the bridge,modular platform system 10 can be installed to suspend from theunderside of the bridge to allow access to desired areas of thestructure. Such repair may include slab demolition, sand or shotblasting the supporting steel and painting the steel structure.Additionally, modular platform system 10 can be adapted to containdebris, such as concrete pieces, removed from the bridge to prevent thedebris from falling to the ground or into the water. In one preferredembodiment of this invention, modular platform system 10 includes acontainment means for containing environmentally hazardous or toxicmaterial, such as lead-based paint, after the hazardous or toxicmaterial has been removed from the structure. The containment meansprevents the environmentally hazardous or toxic material from enteringinto the atmosphere. Modular platform system 10 can be constructedand/or installed from the ground, where the structure spans a street orhighway, or can be constructed and/or installed from the structureitself, where the structure spans a body of water, for example.

[0047] Modular platform system 10 can span any suitable distance, forexample about 10 feet to at least about 100 feet, in order to allowaccess to the entire underside of the bridge structure or otherstructure. Further, modular platform system 10 may extend past the edgeportion of the structure for easy access to materials and/or a sideportion of the structure. It is apparent to those skilled in the artthat the modular platform system of the present invention can be adaptedto span any desired distance with respect to the structure.

[0048] In one preferred embodiment of this invention, modular platformsystem 10 comprises a plurality of platform modules 12. Each platformmodule 12 is suspendable with respect to a structure 100, such as abridge structure. For example, each platform module 12 may be mounted orsecured to at least one support surface, such as a support beam orstringer positioned on an underside or bottom surface of the bridgestructure. The support stringers are typically positioned generallyparallel to a longitudinal centerline of the bridge structure along alength of the bridge.

[0049] Referring to FIGS. 1A-3C, platform module 12 comprises a firstframing member 14 suspended with respect to the structure. For example,first framing member 14 may be suspended to extend or span betweenadjacent support stringers. Preferably, a second framing member 16, thesame or similar to first framing member 14, is suspended with respect tothe structure and mounted with respect to first framing member 14. Forexample, second framing member 16 can be suspended to extend or spanbetween the adjacent support stringers and extend or run generallyparallel to first framing member 14. It should be apparent to thoseskilled in the art and guided by the teachings herein provided that,depending upon whether the bridge section is straight or curved, firstframing member 14 may or may not be parallel to second framing member16. Further, in order to compensate for curvature in the bridgestructure, adjacent modular platform systems 10 may be positioned in askewed position, a fanned position or a straight position with respectto each other.

[0050] As shown for example in FIGS. 3B and 3C, at least one deck panel18 is positioned between first framing member 14 and second framingmember 16 and suspended with respect to the structure 100. Deck panel 18may comprise any suitable material having sufficient strength to supportcontractors, materials, tools and debris. Suitable deck panel materialsinclude metal sheets such as shown in FIG. 11, wood, concrete, compositematerials including insulating materials such as shown in FIG. 12, andcombinations thereof, depending upon the overall size and intended useof modular platform system 10, for example. Further, deck panel 18 mayhave any suitable length, width and/or thickness. In one preferredembodiment of this invention, deck panel 18 comprises a suitablematerial to provide a barrier or seal, such as a vapor barrier, aninsulating barrier, a heat seal, or a solvent seal. Adjacent decl panels18 positioned between first framing member 14 and second framing member16 may be flush or may overlap with respect to adjacent deck panels 18.

[0051] In one preferred embodiment of this invention, at least onesuspension member 20 is used to suspend each of first framing member 14and second framing member 16 with respect to the structure 100.Preferably, but not necessarily, a length of suspension member 20 isadjustable. Referring to FIG. 1A, at least one suspension member 20 isconnected or attached between first framing member 14 and the structure100. For example, suspension member 20 comprises a clamp or othersuitable mechanical connection at a first end portion of suspensionmember 20 to removably mount first framing member 14 to a supportstringer 110 of the structure 100. Similarly, at least one suspensionmember 20 is connected or attached to second framing member 16 andremovably mounted with respect to the structure.

[0052] Suspension member 20 preferably comprises a chain or cable 40having a first connection, such as hook 42, positioned at a first endportion 44 and a second connection, such as hook 46, positioned at asecond end portion 48, as shown in FIG. 1A. Hooks 42 and/or 46 allow theframing members to be suspended from the support stringers quickly andeasily. Preferably, each hook 42,46 comprises a pivot arm to allow thehook to “snap” connect with a corresponding loop fastener. Cable 40 mayhave any suitable length to suspend first framing member 14 and/orsecond framing member 16 at a desired position or distance with respectto support stringer 110. Preferably, the length of cable 40 isadjustable.

[0053] At least one loop fastener 50 is secured to first framing member14. For example, loop fastener 50 may be threadedly connected to a bolt52 that is secured to first framing member 14. As shown in FIG. 1A forexample, a bracket 54 is in contacting relation with an inner surface offirst framing member 14. Preferably, but not necessarily, bracket 54 andat least a portion of bolt 52 are positioned within a cavity 55 formedby first framing member 14. Loop fastener 50 and bolt 52 are rotatablewith respect to each other to tighten or secure fastener 50 to firstframing member 14.

[0054] In one preferred embodiment of this invention, a beam clamp 80 ispositioned and secured to a support beam or stringer 110, as shown inFIG. 1A. Beam clamp 80 comprises a bolt 84 connected to a bracket ortransport trolley 81. A suitable transport trolley is available fromMultuloc Corp. located in Park Ridge, Ill., U.S.A. under the trademarkTULOC. Bolt 84 can be connected or mounted to transport trolley 81 usinga weld or a suitable mechanical connection. As shown in FIG. 1A,transport trolley 81 preferably runs generally parallel with a side edgeof the stringer 110. A bottom bracket 85 is in contacting relation witha bottom surface of the stringer 110. Preferably, bottom bracket 85 isthreadedly connected to bolt 84 to maintain bottom bracket 85 incontacting relation with support stringer 110. A top bracket 86 ispositioned about bolt 84 and maintained in contacting relation withsupport stringer 110 by a nut arrangement 87. A set screw 91 isthreadedly connected to top bracket 86 and rotatable with respect to topbracket 86 to secure beam clamp 80 with respect to the support stringer.Nut arrangement 87 comprises a beveled washer 90 which allows beam clamp80 to be secured to a support beam or stringer having any suitablethickness, regardless of whether the stringer has a flat contactingsurface or a sloped contacting surface.

[0055] For example, some old beams and channels have an interior flangesurface with a 1 to 6 slope. Beam clamp 80 compensates for the slopedtop flange surface by providing beveled washer 90 and a tolerancebetween bolt 84 and an aperture formed in top bracket 86 within whichbolt 84 is positioned. For example, in one preferred embodiment of thisinvention, bolt 84 has a ½ inch diameter and the aperture formed in thetop bracket 86 has a {fraction (9/16)} inch diameter. Thus, top bracket86 has a 1 to 6 slope with respect to bolt 84 to maintain a contactingrelation with the sloped flange surface of the stringer. Beam clamp 80maintains maximum torque, and coupled with set screw 91, resists lateralforces to provide full contact at the beam edge and point contactbearing through set screw 91 while adjusting for any tolerancevariances.

[0056] As shown in FIGS. 1A-2, a wire or cable 88 can be connectedbetween suspension members 20 at beam clamp 80 positioned with respectto the support stringer 110 to maintain beam clamp 80 securely connectedwith respect to the support stringer 110.

[0057] At least one channel trolley 70 is mounted with respect totransport trolley 81. Preferably, channel trolley 70 is positionedwithin a channel 83 formed by transport trolley 81. Referring further toFIGS. 4 and 5, channel trolley 70 comprises at least one rotatable wheel72. Rotatable wheels 72 are positionable within channel 83 to allowrelative movement of platform module 12 with respect to the stringer110. Suspension member 20 preferably comprises a second connection, suchas hook 46, positioned at a second end portion 48, as shown in FIG. 1A.Hook 46 allows the framing members to be suspended from the supportstringers quickly and easily. Preferably, each hook 46 comprises a pivotarm to allow the hook to “snap” connect with an aperture formed inchannel trolley 70.

[0058] At least one loop fastener 50 is secured to first framing member14. For example, loop fastener 50 may be threadedly connected to a bolt52 that is secured to first framing member 14. As shown in FIG. 1A forexample, a bracket 54 is in contacting relation with an inner surface offirst framing member 14. Preferably, but not necessarily, bracket 54 andat least a portion of bolt 52 are positioned within a cavity 55 formedby first framing member 14. Loop fastener 50 and bolt 52 are rotatablewith respect to each other to tighten or secure fastener 50 to firstframing member 14.

[0059] In one preferred embodiment as shown in FIG. 1B, a fastener 50can be connected directly to bolt 84. Preferably, but not necessarily,fastener 50 contacts bottom bracket 85 to maintain beam clamp 80securely fastened to the stringer 110. In this embodiment, hook 46 iseasily connected to fastener 50 to suspend platform module 12 withrespect to the structure. Alternatively, cable 40 can be positionedbetween bottom bracket 85 and the stringer so that hook 42 and hook 46each are connected to loop fastener 50, connected to framing member 14,16.

[0060] Beam clamp 80 allows a containment or safety system, such as anet or fence suspended with respect to the structure and/or a loadbearing system, such as modular platform system 10, for supporting aload, for example contractors working on the structure, to be connectedwith respect to the structure.

[0061] In one preferred embodiment of this invention, each of firstframing member 14 and second framing member 16 is removably suspended ormounted to the structure using beam clamp 80, as shown in FIGS. 3A-3C.Beam clamp 80 comprises a strut 82. At least one suspension member 20 ismounted or connected with respect to strut 82 which extends along awidth of support stringer 110. For example as shown in FIG. 3A, asuspension member 20 is connected at first end portion 44 having a firsthook 42 to a first loop fastener 50 mounted to first framing member 14and at a second end portion 48 having a second hook 46 to a second loopfastener 50 mounted to first framing member 14. In this embodiment, atleast one suspension member 20 runs through at least a portion of achannel formed by strut 82 and around at least one pin connection 93positioned within an aperture 92 formed in strut 82. Alternatively, twosuspension members 20 may be independently connected to strut 82 usingpin connections 93 positioned within a desired aperture 92. Bolt 84 isconnected to strut 82, for example, using a weld or a suitablemechanical connection. Bottom bracket 85 and top bracket 86 arepositioned about bolt 84 and maintained in contacting relation withsupport stringer 110 by nut arrangement 87. Preferably, bottom bracket85 is threadedly connected to bolt 84 to maintain bottom bracket 85 incontacting relation with support stringer 110. Set screw 91 isthreadedly connected to top bracket 86 and rotatable with respect to topbracket 86 to secure beam clamp 80 with respect to the support stringer.Beveled washer 90 allows beam clamp 80 to be secured to a support beamor stringer having any suitable thickness, regardless of whether thestringer has a flat contacting surface or a sloped contacting surface.

[0062] In one preferred embodiment of this invention, strut 82 forms aplurality of apertures 92 for mounting each suspension member 20 withrespect to strut 82. A distance between the framing member and thesupport stringer is adjustable by selecting a desired or appropriateaperture 92 within which pin connection 93 can be secured to adjust alength of suspension member 20 positioned between strut 82 and framingmembers 14, 16, depending upon the physical limitations associated withthe intended use of modular platform system 10. As shown in FIG. 3B, twoor more suspension members 20 can be connected with respect to strut. 82to allow framing member 14,16 of laterally adjacent platform modules 12to be suspended with respect to structure 100.

[0063] In one embodiment of this invention as shown in FIG. 3C, a strut95 can be connected to adjacent beam clamps 80. Strut 95 forms a channelwithin which at least one channel trolley 70 can be movably positioned.At least one suspension member 20 can be connected to channel trolley 70to suspend platform module 12 with respect to structure 100. Channeltrolley 70 comprises rotatable wheels 72 which can be movably positionedwithin the strut channel to allow suspended platform module 12 to movewith respect to the structure.

[0064] Referring to FIGS. 6-8, in one preferred embodiment of thisinvention, modular platform system 10 comprises a plurality ofoperatively connected platform modules 12 which are suspended orsupported with respect to the structure. Each platform module 12comprises a first framing member 14, a second framing member 16 and atleast one deck panel 18 positioned between first framing member 14 andsecond framing member 16 and suspendable with respect to structure 100,as shown for example in FIG. 6.

[0065] A second platform module 12′ is movable with respect to the firstplatform module 12 between a first position operatively connected tofirst platform module 12 and a second or extended position linearlyaligned with first platform module 12. Preferably, second platformmodule 12′ is the same or similar to first platform module 12. Secondplatform module 12′ comprises a first framing member 14′ movably mountedto at least one channel trolley 70 secured or mounted with respect tofirst platform module first framing member 14 and a second platformmodule second framing member 16′ movably mounted to at least one channeltrolley 70 secured or mounted with respect to first platform modulesecond framing member 14. Rotatable wheels 72 are positionable within achannel 75, 76 formed by the second platform module framing member 14′,16′, respectively.

[0066] In the second position, second platform module 12′ is removablysuspended with respect to the structure from a support beam or stringerfor example, and in linear alignment with platform module 12, using atleast one suspension member 20 attached to first framing member 14′ andat least one suspension member 20 attached to second framing member 16′.Further, a connecting bracket or other suitable mechanical connectioncan be used to connect first framing member 14′ in linear alignment withfirst framing member 14 and second framing member 16′ in linearalignment with second framing member 16. In the second position, deckpanel 18′, positioned between first framing member 14′ and secondframing member 16′, is suspended with respect to the structure.

[0067] Preferably, as shown in FIG. 7, first framing member 14 andcorresponding second framing member 16 extend between the first supportstringer 110 and a second support stringer 110′ of the structure,generally parallel to the first support stringer 110. It is apparent tothose skilled in the art and guided by the teachings herein provided,that each of first framing member 14 and second framing member 16 mayhave any suitable length, as required by the size of the structure andthe system application.

[0068] A second plurality of operatively connected platform modules 12can be suspended or supported from the structure and positionedlaterally adjacent the first plurality of platform modules 12, as shownin FIGS. 9 and 10, such that first framing member 14 of platform module12 contacts or approaches second framing member 16 of the laterallyadjacent platform modular 12. Laterally adjacent platform modules 12 canbe connected using a connecting bracket or other suitable mechanicalconnection. Additionally, a closure element 98 can be “snap-fitted” intoa space formed at a connection of adjacent platform modules 12, as shownin FIG. 9. Closure element 98 contains debris, including hazardousmaterials such as lead-paint. Further, in one preferred embodiment ofthis invention, a panel, for example wood or a containment tarp 99, suchas shown in FIG. 10, is positioned across the laterally adjacentplatform modules 12 to maintain a tight seal between the platformmodules 12 to contain debris and/or environmentally hazardous materials,such as lead paint removed from the structure. As shown in FIG. 10,containment tarp 99 is preferably flexible to connect laterally adjacentplatform modules 12 that are not level, or stepped, as a result of thestructure or its support stringers being angled or sloped. One suitablematerial for containment tarp 99 is a reinforced plastic material havinga thickness of about 6 mils. It should be apparent to those havingordinary skill in the art and guided by the teachings herein that othermaterials are suitable for containment tarp 99.

[0069] In one preferred embodiment of this invention, modular platformsystem 10 is installed on a structure, such as a highway or road bridge,having a plurality of support beams or stringers generally parallel thelongitudinal centerline of the bridge along the length of the bridge.Modular platform system 10 is preferably, but not necessarily, installedlaterally across the bridge, i.e. generally perpendicular to the lengthof the support beams or stringers. Modular platform system 10 includinga plurality of operatively connected platform modules 12 is temporarilysuspended with respect to the underside of the bridge, for example usinga crane or other suitable machinery positioned on a top or road surfaceof the bridge. With modular platform system 10 positioned with respectto the underside of the structure, the modular platform system 10 issuspended with respect to at least one structure support beam orstringer. For example, the platform module 12 is secured to thestructure. First framing member 14 is removably mounted to a firstsupport beam or stringer using suspension member 20. Similarly, secondframing member 16 is removably mounted to the first support beam orstringer using suspension member 20. Preferably, each of first framingmember 14 and second framing member 16 is suspended with respect to thestructure using adjustable suspension members 20 so that the distancebetween panel 18 and the underside of the bridge can be adjustedaccording to the work scheduled on the bridge.

[0070] Platform module 12′ is extended from the first position belowplatform module 12 to the second or extended position linearly alignedwith platform modular 12. Platform module 12′ is suspended from thestructure. First framing member 14′ and second framing member 16′ areremovably mounted to the support beam or stringer using suspensionmember 20. With platform module 12′ in the second position and in linearalignment with platform module 12, platform module 12′ can be connectedor attached to platform module 12 using a suitable mechanicalconnection. For example, first framing member 14′ can be fastened orconnected to first framing member 14 and second framing member 16′ canbe fastened or connected to second framing member 16 using a connectingbracket.

[0071] A second modular platform system, preferably the same or similarto the first modular platform system, is constructed with respect to thestructure. For example, the second modular platform system can besuspended with respect to the structure laterally adjacent the firstmodular platform system comprising a plurality of operatively connectedplatform modules. The second modular platform system can be suspendedwith respect to the structure as the first modular platform system issuspended. Preferably, second modular platform system is connected tothe first modular platform system using any suitable mechanicalconnections. For example, in order to provide for containment of debrisremoved from the structure, wood pieces and/or tarp pieces can bepositioned at the abutting framing members to provide containment orseal spaces between adjacent framing members.

[0072] In one preferred embodiment of this invention, modular platformsystem 10 may be suspended from support stringer 110, at a firstvertical distance to preform one process, such as sandblasting, and thenlowered or raised to a second vertical distance with respect to supportstringer 110 to perform another process, such as painting. For example,a threaded rod extension coupled to a coupler nut can be connected withrespect to the structure. In one embodiment of this invention, thecoupler nut can be rotated to allow a plate securing each structure to abeam flange to be rotated by a suitable rotational distance, for exampleabout 180°, to allow the panel structure to be raised or lowered withrespect to the beam flange in order to continue work on the structure,if desired. The coupler nut or other suitable mechanical connection canalso prevent or limit damage to the threaded rod extension as a resultof processes such as sandblasting and painting. It is apparent thatsuitable mechanical connections may be used to secure the structuresdirectly or indirectly to the support surface.

[0073] In one embodiment of this invention, a counter-balancing weight101 such as shown in FIG. 7, for example a suitably-sized concreteblock, can be positioned on one end portion of modular platform system10 so that the modular platform system 10 is cantilevered over the edgeportion of the bridge. Adjustments can be made, for example inincrements of about 6 inches, with respect to balancing modular platformsystem 10 by positioning the counter-balancing weight with respect to alength of modular platform system 10. Thus, one counter-balancing weightcan handle a variety of loads by moving the weight along a length ofmodular platform system 10.

[0074] If modular platform system 10 spans a hard surface, for example aroad or highway, modular platform system can be suspended with respectto the structure from the surface below. For example, a rough terrainscissors lift or other suitable machine can move or lift modularplatform system 10 into position with respect to the structure andsuspension members 20 may be connected to beam clamps 80 properlypositioned on the support stringers of the structure to suspend modularplatform system 10 with respect to the structure.

[0075] In one embodiment of this invention, platform module 12 comprisesan absorbing layer of plywood applied over deck panels 18 to protectplatform module 12 so that modular platform system 10 is reusable. Theplywood panels or sheets absorb the weight of concrete pieces droppingonto modular platform system 10 during demolition, for example. Further,tight seals can be formed using the plywood to contain lead-base paintdust, for example, created during sand blasting or shot blastingprocedures. Preferably, but not necessarily, the plywood sheets areattached to modular platform system 10 by nailing the plywood and/orplywood clamping strips to wood, for example pieces of standard 2×4s,positioned within each framing member. Preferably, the pieces of woodare inserted into the rolled shape of the framing member. It is apparentto those skilled in the art that any suitable mechanical connection maybe used to secure the plywood sheets to the platform panels. Forexample, the top piece of plywood may clamp a 4 foot standard widthplywood piece in place.

[0076] Preferably, but not necessarily, platform module 12 may furthercomprise at least one adjustable strut spacer 97, such as shown in FIG.11, having a first end portion connected with respect to first framingmember 14 and a second end portion connected with respect to secondframing member 16. Strut spacer 97 provides increased strength andrigidity to the platform module 12, particularly when platform module 12is subjected to large loads.

[0077] Referring to FIGS. 13 and 14, in one embodiment of thisinvention, a guard rail system 120 suitable for adhering to governmentsafety standards, such as O.S.H.A., is connected to modular platformsystem 10. Guard rail system 120 preferably comprises a plurality ofposts 122 positioned within and secured to first framing member 14and/or second framing member 16. A chain or cable 124 extends betweenthe posts 122 to provide perimeter protection and prevent workers fromfalling from the side of modular platform system 10. As shown in FIG.14, posts 122 are positioned within and secured to framing member 14, 16using a bolt and nut combination. For example, bolt 126 is threadedlyconnected to a bottom portion 128 of post 122. Bolt 126 is rotatablewith respect to a plate or bracket 130 positioned within the framingmember to tighten and secure post 122 with respect to the framingmember. It should be apparent to those skilled in the art and guided bythe teachings herein that other suitable mechanical connections may beused to secure each post 122 to the corresponding framing member 14, 16.

[0078] In one preferred embodiment of this invention as shown in FIG.15, platform module 212 comprises a first framing member 214 suspendedwith respect to the structure, and a second framing member 216, the sameor similar to first framing member 214, suspended with respect to thestructure and mounted with respect to first framing member 214. At leastone suspension member 220 is used to suspend each of first framingmember 214 and second framing member 216 with respect to the structure100. Referring to FIG. 15, at least one suspension member 220 isconnected or attached between first framing member 214 and the structure100. Similarly, at least one suspension member 220′ is connected orattached to second framing member 216 and removably mounted with respectto the structure. In the figures, suspension member 220 and suspensionmember 220′ may be shown according to different embodiments of thisinvention. However, it should be apparent to those having ordinary skillin the art that suspension member 220 may be the same or similar tosuspension member 220′.

[0079] Suspension member 220 may comprise a threaded rod 221 connectedat a first end portion 222 to one of first framing member 214 and secondframing member 216, and at a second end portion 224 to the structure. Alower bracket 225 is positioned at a first edge surface 215 of firstframing member 214. A nut 226 is threadedly connected to an end portionof threaded rod 221 to maintain lower bracket 225 in contacting relationwith first edge surface 215. Preferably, but not necessarily, nut 226 ispositioned within a cavity 227 formed by first framing member 214. Anupper bracket 229 is positioned at a second edge surface 217 of firstframing member 214 and a nut 230 is threadedly connected to threaded rod221 to maintain upper bracket 229 in contacting relation with secondedge surface 217. Nut 226 and nut 230 are rotatable with respect to eachother about threaded rod 221 to tighten or secure suspension member 220to first framing member 214. Further, nut 226 can be positioned along alength of threaded rod 221 to position first framing member 214 at adesired position or distance with respect to the structure 100.

[0080] A similar mechanical connection can be used to secure second endportion 224 to the structure 100. For example, as shown in FIG. 15, anupper bracket 232 is positioned at second end portion 224. A nut 234 isthreadedly connected to second end portion 224 to maintain upper bracket232 in contacting relation with a top surface of support stringer 110. Alower bracket 236 is positioned at a bottom surface of support stringer110 and a nut 238 is threadedly connected to threaded rod 221 tomaintain lower bracket 236 in contacting relation with the bottomsurface of support stringer 110. Nut 234 and nut 238 are rotatable withrespect to each other about threaded rod 221 to tighten or securesuspension member 220 to support stringer 110. Further, nut 238 can bepositioned along a length of threaded rod 221 to position first framingmember 214 at a desired position or distance with respect to thestructure 100.

[0081] Second suspension member 220′ can be the same or similar to firstsuspension member 220. Alternatively, second suspension member 220′comprises a chain or cable 240 having a first connection, such as hook242, positioned at a first end portion 244 and a second connection, suchas hook 246, positioned at a second end portion 248, as shown in FIG.15. Hooks 242 and/or 246 allow the framing members to be suspended fromthe support stringers quickly and easily. Preferably, each hook 242, 246comprises a pivot arm to allow the hook to “snap” connect with acorresponding loop fastener. Cable 240 may have any suitable length tosuspend second framing member 216 at a desired position or distance withrespect to support stringer 110. Preferably, the length of cable 240 isadjustable. A loop fastener 250 is secured to second framing member 216.For example, loop fastener 250 may be threadedly connected to a bolt 252that is secured to second framing member 216. As shown in FIG. 15 forexample, a bracket 254 is in contacting relation with a first edgesurface 255 of second framing member 216. Preferably, but notnecessarily, bracket 254 and a head portion 253 of bolt 252 ispositioned within a cavity 257 formed by second framing member 216. Loopfastener 250 and bolt 252 are rotatable with respect to each other totighten or secure suspension member 220′ to second framing member 216.

[0082] A similar mechanical connection can be used to secure second endportion 248 to the structure 100. For example, as shown in FIG. 15, anupper bracket 256 is in contacting relation with a top surface ofsupport stringer 110. A lower bracket 258 is positioned at a bottomsurface of support stringer 110 and a hoop fastener 260 is threadedlyconnected to a bolt 262 to maintain lower bracket 258 in contactingrelation with the bottom surface of support stringer 110. Hoop fastener260 and bolt 262 are rotatable with respect to each other to tighten orsecure suspension member 220′ to support surface 110.

[0083] In one preferred embodiment of this invention, at least onechannel trolley 270 is mounted with respect to platform module 212.Channel trolley 270 can be connected to platform module 212 using anysuitable connection, such as a weld or a suitable mechanicalarrangement. Preferably, at least one channel trolley 270 is connectedto each of first framing member 214 and second framing member 216, asshown for example in FIG. 15. Rotatable wheels 272 are positionablewithin a channel formed by a framing member to allow relative movementof a framing member with respect to an adjacent or operatively connectedframing member.

[0084] The modular platform system of the present invention providesquick deployment and installation of the system, thereby decreasingcosts associated with project set-up and labor charges. Further, thecontainment means can be used where government regulations andrestrictions must be satisfied, such as when removing lead-based paintfrom the structure. The modular platform system of the present inventioncan be used in general construction projects for demolition and/orinspection by inspectors or foreman, for example. Additionally, themodular platform system of the present invention can be used within anindustrial or manufacturing facility. The modular platform system can betemporarily or permanently suspended from ceiling trusses to permit workto be performed above equipment and machinery without the need to shutdown the equipment or delay the manufacturing processes, for example.

[0085] While in the foregoing specification this invention has beendescribed as a modular platform system suspendable with respect to asupport structure of a bridge construction, this invention is alsosuitable for other purposes, such as a suspended building ceiling,capable of supporting dynamic loads, such as people, and/or staticloads, such as cables and wires.

[0086] While in the foregoing specification this invention has beendescribed in relation to certain preferred embodiments thereof, and manydetails have been set forth for purpose of illustration, it will beapparent to those skilled in the art that the invention is susceptibleto additional embodiments and that certain of the details described canbe varied considerably without departing from the basic principles ofthe invention.

What is claimed is:
 1. A modular platform system suspendable withrespect to an underside of a structure for supporting a dynamic loadcomprising: a first platform module comprising a first framing membersuspendable with respect to the structure; a second framing membersuspendable with respect to the structure and mounted with respect tothe first framing member; and a deck panel positioned between the firstframing member and the second framing member and suspendable withrespect to the structure; a second platform module comprising a firstframing member suspendable with respect to the structure; a secondframing member suspendable with respect to the structure and mountedwith respect to the first framing member; and a deck panel positionedbetween the first framing member and the second framing member andsuspendable with respect to the structure; and at least one channeltrolley mounted with respect to the first platform module, wherein thesecond platform module movably connected to the at least one channeltrolley and movable with respect to the first platform module between afirst position operatively connected to the first platform module and asecond position linearly aligned with the first platform module.
 2. Theplatform module of claim 1 further comprising: a plurality of suspensionmembers connected with respect to the first platform module, at leastone adjustable suspension member attached to each of the first framingmember and the second framing member, and each suspension memberremovably mountable with respect to the structure; and a plurality ofsuspension members connected with respect to the second platform module,at least one adjustable suspension member attached to each of the firstframing member and the second framing member, and each suspension memberremovably mountable with respect to the structure with the secondplatform module in the second position.
 3. The platform module of claim1 wherein the second platform module first framing member is operativelyconnected to the first platform module first framing member, and atleast one channel trolley is mounted to the first platform module firstframing member and positioned within a channel formed by the secondplatform module first framing member; and the second platform modulesecond framing member is operatively connected to the first platformmodule second framing member, and at least one channel trolley ismounted to the first platform module second framing member andpositioned within a channel formed by the second platform module secondframing member.
 4. The platform module of claim 3 wherein the at leastone channel trolley comprises at least one rotatable wheel positionablewithin the channel of one of the second platform module first framingmember and the second platform module second framing member.
 5. Theplatform module of claim 2 wherein the at least one adjustablesuspension member comprises at least one of a cable, a chain, a rod, ahook, and a threaded rod.
 6. The platform module of claim 1 wherein thefirst platform module and the second platform module are connected inthe second position.
 7. The platform module of claim 2 wherein the atleast one adjustable suspension member attached to each of the firstframing member and the second framing member is removably mounted to asupport surface of the structure.
 8. The platform module of claim 2further comprising a strut connected between a first suspension memberand a second suspension member and contacting a support surface of thestructure.
 9. A modular platform system suspendable from a structure forsupporting a load with respect to an underside of the structurecomprising a plurality of platform modules, each platform modulecomprising: a first framing member suspended between a first supportsurface of the structure and a second support surface of the structure;a second framing member suspended between the first support surface andthe second support surface and mounted with respect to the first framingmember; a deck panel positioned between the first framing member and thesecond framing member and suspended with respect to the structure; aplurality of suspension members each attached to the first framingmember and removably mounted with respect to one of the first supportsurface and the second support surface; and a plurality of suspensionmembers each attached to the second framing member and removably mountedwith respect to one of the first support surface and the second supportsurface.
 10. The modular platform system of claim 9 wherein eachplatform module further comprises at least one adjustable strut spacerhaving a first end portion and a second end portion, the first endportion connected to the first framing member and the second end portionconnected to the second framing member.
 11. The modular platform systemof claim 9 wherein the deck panel comprises at least one of a vaporbarrier, a heat seal and a solvent seal.
 12. A modular platform systemsupported from a structure comprising: a plurality of operativelyconnected platform modules, each platform module comprising a firstframing member, a second framing member and at least one deck panelpositioned between the first framing member and the second framingmember and suspended with respect to the structure; wherein a secondplatform module of the plurality of platform modules is movable withrespect to a first platform module of the plurality of platform modulesbetween a first position operatively connected to the first platformmodule and a second position linearly aligned with the first platformmodule.
 13. The modular platform system of claim 12 further comprising athird platform module of the plurality of platform modules movable withrespect to the second platform module of the plurality of platformmodules between a first position operatively connected to the secondplatform module and a second position linearly aligned with the secondplatform module.
 14. The modular platform system of claim 12 wherein thesecond platform module first framing member is movably mounted to atleast one channel trolley secured with respect to the first platformmodule first framing member and the second platform module secondframing member is movably mounted to at least one channel trolleysecured with respect to the first platform module second framing member.15. The modular platform system of claim 14 wherein the at least onechannel trolley comprises at least one rotatable wheel, the at least onerotatable wheel positionable within a channel formed by thecorresponding second platform module framing member.
 16. The modularplatform system of claim 12 wherein the first platform module issuspended with respect to the structure using at least one suspensionmember attached to the first framing member and at least one suspensionmember attached to the second framing member, each suspension memberremovably mounted with respect to the support surface.
 17. The modularplatform system of claim 12 wherein a length of each suspension memberis adjustable.
 18. The modular platform system of claim 12 wherein thesecond platform module is suspended with respect to the structure in thesecond position using at least one suspension member attached to thefirst framing member and at least one suspension member attached to thesecond framing member, each suspension member removably mounted withrespect to the structure.
 19. A method for installing a modular platformsystem supported from a structure for supporting a dynamic load withrespect to a support surface of the structure comprising the steps of:constructing the modular platform system comprising a plurality ofoperatively connected platform modules, each platform module comprisinga first framing member, a second framing member, and at least one deckpanel positioned between the first framing member and the second framingmember; suspending a platform module of the plurality of platformmodules with respect to the structure; extending one or more additionalplatform modules from a first position operatively connected to anadjacent platform module to a second position linearly aligned with theadjacent platform module; and suspending the additional platform moduleswith respect to the structure.
 20. The method of claim 19 wherein eachof the plurality of platform modules is suspended with respect to thestructure using at least one adjustable suspension member attached tothe first framing member and at least one adjustable suspension memberattached to the second framing member.
 21. The method of claim 20wherein each of the adjustable suspension members is removably mountedwith respect to a support surface of the structure.
 22. The method ofclaim 19 further comprising connecting the first platform module to thesecond platform module in the second position.
 23. The method of claim19 further comprising the steps of: constructing a second modularplatform system laterally adjacent the first modular platform systemcomprising a plurality of operatively connected platform modules;suspending a first platform module of the second modular platform systemwith respect to the structure; extending a second platform module from afirst position operatively connected to the first platform module to asecond position linearly aligned with the first platform module; andsuspending the second platform module with respect to the structure. 24.The method of claim 23 further comprising connecting the second modularplatform system to the first modular platform system.